Changes in capacitance are used by a capacitive force sensor to assess pressure or force. Capacitance is a property of a system made up of two conducting surfaces separated by a dielectric material, like air or another non-conductive substance.
Here's how it typically works.
1、Basic Structure: The sensor usually consists of two conductive plates separated by a small gap. When no force is applied, the gap remains constant.
2、Application of Force: When a force is applied to the sensor, the separation between the two plates changes. This variation in distance alters the capacitance between the plates.
3、Capacitance Change: As the distance between the plates changes, the capacitance of the sensor changes accordingly. This change in capacitance can be measured using appropriate electronics.
4、Measurement: The electronics connected to the sensor measure the capacitance change and convert it into a proportional force or pressure reading.
5、Calibration: To ensure accurate measurements, the sensor may need to be calibrated to relate changes in capacitance to the force or pressure being applied.
6、Output: The output of the sensor can be in the form of an analog voltage, digital signal, or other formats depending on the design and application requirements.
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